added a close button when launcher is launched with the parameter
--closebutton=1 as requested by Vonwerner

submitted through the RS Forums:
http://services.runescape.com/m=forum/forums.ws?25,26,99,61985129,goto,701#7003
Changed version to 4.1.5
updated the changelog
Merge remote-tracking branch 'refs/remotes/origin/development' into bleeding-edge